Preparing an Image For the Internet

The following steps need to be performed in order to optimise your image and convert it to the correct format for loading to the internet.

  1. Start Paintshop Pro and open the image that you wish to load to the internet. Paintshop Pro can handle many different image formats which you can select using the Files of Type field in the OPEN window.
  2. Next you should resize your image to match exactly with the size that you intend to display on the screen. You can do this using either the resize or resample options from the Image menu. Resample will give a better result for images involving a lot of colours.
  3. If the image that you are optimizing is a photograph or other image requiring more than 256 colours then you should now save the image in JPEG format - see below.
  4. The next step (if not saving as JPEG) is to check the number of colours currently used by the image using the Count Colors Used option from the Colors menu. You can now use the Decrease Color Depth option on the same menu to reduce the number of colours to that which you actually require the image to have (the fewer colours, the smaller the resultant file). You should now save the image in GIF format - see below.

 

Saving as JPEG

You use the Save as option from the File menu to save a file in a different format from the original. When saving in JPEG - JPG - JFIF Compliant format using a Sub Type of Progressive Encoding will allow the image to load progressively greater detail for those using a slow internet connection.

The options available when saving as JPEG are dots per inch which should be set to 72 and Compression level. The greater the compression level specified, the smaller the resultant file but the lower the quality of the resultant image. You might like to experiment with different values in this field to determine what level is appropriate for your images. I have used 50% and noticed very little reduction in picture quality but it depends on the amount of detail in your image.

 

Saving as GIF

You use the Save as option from the File menu to save a file in a different format from the original. When saving in GIF - Compuserve format using a Sub Type of Version 89a - Interlaced will allow you to make the background colour of your image transparent and will allow the image to load progressively greater detail for those using a slow internet connection.

The options available when saving as GIF relate to retaining and setting of transparency. You can use this to make your background colour (around the outside of your image) transparent and hence display the object without it appearing to be in a box.

 

This article written by Stephen Chapman, Felgall Pty Ltd.

go to top

FaceBook Follow
Twitter Follow
Donate